Abstract

We present the results of our time-resolved measurements of hot-carrier luminescence from passively quenched Geiger-mode avalanche photodiodes. In time-correlated photon-counting (TCPC) experiments, hot-carrier luminescence interferes overwhelmingly with the coincidence spectrum, which results in artifacts. This potential problem should be taken into account in setting up TCPC experiments.

Figures (3)

Setup for time-correlated measurement of entangled photons. The squares show different possibilities for overlap of APD imaging paths. The shaded circles are the entangled photon streams, and the larger circles are regions imaged by the APD’s: 1, no overlap; 2, overlap owing to misalignment; 3, inevitable overlap at optimum alignment. TAC, time-to-amplitude converter; MCA, multichannel analyzer.